Looks unused but no way for me to know.

The Agilent HP Keysight 84905M Step Attenuator is a high-quality test equipment part designed for precise measurement and inspection in various industrial and commercial settings. With a 60 dB attenuation range and frequency coverage from DC to 50 GHz, this 2.4mm female attenuator is ideal for a wide range of applications. Manufactured by Keysight, a trusted brand in the industry, this model offers reliable performance and accuracy for testing and measurement tasks.